Electronic clock



FIG. 1 is a left, front and bottom perspective view of an electronic clock showing my new design;

FIG. 2 is a left, front and top perspective view thereof;

FIG. 3 is a right, front and bottom perspective view thereof;

FIG. 4 is a right, rear and top perspective view thereof.

The electric cord of FIG. 4 has been omitted from FIGS. 1-3 for ease of illustration. 

The ornamental design for an electronic clock, as shown and described. 